By McQuarrie D.
By Keith Tudor, Tony Merry
By Mary D. King, John B. P. Stephenson
By Neil Short
By Peter Dawson, David O. Cosgrove, Ronald G Grainger
By I. Nechaev, Gerald Jenkins, Nechaev, I., Jenkins, Gerald, Van Loon, Borin
By G. R. Park, P. G. Roe, Park, G. R., Roe, P. G.
By Ken Thompson
By P. Ting, A. Shetty, N. Goddard, G. Dowd
By Andrea Kelleher, Anne Black
By Mark Chatterton
By Michael Murphy
By Jafaru Abu, David Ireland
By Jackie Lynch
By Khalid Binymin
By David Rayner, Paul Williams
By J Jobbins
By R. Cavallo
By World Health Organization(WHO)
By Food and Agriculture Organization of the United Nations
By Organization for Economic Co-operation and Development
By United Nations Environment Programme
By Kalbande
By Rajesh Daniel
By No Listed Author
By Darwin, Charles, Browne, Janet, Neve, Michael
By Trill, J., Bowyer, Jack